Every fifteen years, something strange happens to Saturn's rings. They disappear for a few minutes when they turn edge toward to us. It happened again this past May , and will repeat twice more in the coming year. The event gives astronomers a unique opportunity to study the rings and hunt for tiny moons, and will help scientist plan NASA's upcoming mission to Saturn which will visit the ringed planet in 2004. Linda Horn, mission scientists, of the Jet Propulsion Laboratory talks about the mission in this, the final episode of Space Stories, production of which has been discontinued by NASA.
One minute Frontiers version: